/Engine/Source/Runtime/Engine/Public/VisualLogger/VisualLoggerTypes.h
Histogram sample
void AddHistogramData ( const FVector2D & DataSample, const [FName](API\Runtime\Core\UObject\FName) & CategoryName, [ELogVerbosity::Type](API\Runtime\Core\Logging\ELogVerbosity__Type) Verbosity, const [FName](API\Runtime\Core\UObject\FName) & GraphName, const [FName](API\Runtime\Core\UObject\FName) & DataName )